<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			*{
				padding: 0;
				margin: 0;
			}
			p {
				width: 100px;
				height: 100px;
				border: 1px solid red;
				/*display: none;*/
			}
		</style>
		<script type="text/javascript" src="js/jquery-1.11.1.min.js" ></script>
		<script type="text/javascript">
			$(function(){
				$("#btn1").click(function(){
//					$("p").show(2000);
					$("p").hide(2000);
				});
			});
		</script>
	</head>

	<body>
		<input type="button" id="btn1" value="点我" />
		<p></p>
	</body>

</html>